vice president joe biden during his visit last week. the u.s. state department has declared itself on the same page as seoul. an expanded south korean zone would have nothing to do with maritime jurisdiction. adding it would stay in communication with seoul. china's actions last month have given it the chance to do just that. but it leaves one part of the east china sea belonging to two zones, china, japan and south korea. how to manage such a complex state of affairs, equally, they could set the stage for what nobody wants, and accident conflict and increasingly contentious skies. harry faucett al jazeera, seoul. >> paying respect to the leadership of nelson mandela. a few hours ago jacob zuma and 1ie mandela attended a church service in johannesburg. alan schauffler, how are they doing that? >> a day of memory, what apartheid was and how he acted to change it. and also, to reflect on the work that may be left, the work ahead. here in villa kazi street in suweto, this street has been filled all day long, chanting, singing, praising mandela. we'